Because microfluidic devices provide a well-defined geometry that can
straightforwardly be massively-parallelized, there exists a great potential
for processing particles in microsystems. Applications include:

preprocessing complex samples to eliminate particles before injection into a
microfluidic device

Kirby BJ
"Micropatterning in injection-molded microdevices and engineered tissue scaffolds: the role of electrokinetic coupling",
University of Illinois Mechancal Science and Engineering Department, Urbana, IL